Electric toothbrush



FIG. 1 is a perspective view of an electric toothbrush;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front side elevational view thereof, the rear side elevational view being a mirror image thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left end view thereof; and,

FIG. 6 is a right end view.

The broken line showing of environmental structure in FIGS. 1-3 and 6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an electric toothbrush, as shown and described. 